<%--
  Created by IntelliJ IDEA.
  User: zsr
  Date: 2021/3/20
  Time: 8:37
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
 <%
        pageContext.setAttribute("key","pageContext");
        request.setAttribute("key","request");
        session.setAttribute("key","session");
        application.setAttribute("key","application");
 %>
    ${key}
</body>
</html>
